There is a blog for just about everything. Mary Carmen Chimato's Circ and Serve has a great one that talks about issues relating to circulation, Interlibrary Loan and anything to do with providing services to her patrons at North Carolina State University Libraries.
There are posts that talk about the continuing importance of Interlibrary loans, teamwork issues with co-workers and staff, and customer service techniques. The simplest one to master seems to be smile and acknowledge the other person be they patron or staff member.
I have to work on that one because I get focused on what I am thinking about. I sometimes forget there are other people around who don't know I'm not upset, I'm just thinking semi-shallow thoughts. Definitely a good blog to visit on a regular basis.